Piezoresistance measurements of YBa sub 2 Cu sub 3 O sub 7 minus x showing large magnitude and temporal anomalies between 100 and 300 K

Journal Article · Fri Dec 01 00:00:00 EST 1989 · Physical Review (Section) B: Condensed Matter; (USA)

DOI:https://doi.org/10.1103/PhysRevB.40.11313· OSTI ID:5147606

Kennedy, R J; Jenks, W G; Testardi, L R ^[1]

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1. Physics Department, Florida State University, Tallahassee, Florida 32306 (US)

The response of ceramic YBa{sub 2}Cu{sub 3}O{sub 7{minus}{ital x}} to a uniaxial switched static stress has been investigated by resistivity measurements. For a compressive stress {sigma}{le}1.5{times}10{sup 7} N/m{sup 2} (considered positive), the room-temperature piezoresistance coefficient was negative, and no time dependence ({ge}1 sec) was observed. For higher stresses the piezoresistance coefficient changed sign and reached the unusually large value of 2.5{times}10{sup {minus}8} m{sup 2}/N. In this stress regime the resistivity exhibited nearly reversible time-dependent growth or decay after the stress level was rapidly changed. Typical growth or relaxation times were {similar to}6--30 sec. The change in resistivity with stress showed a sign reversal at 220 K on cooling and was small below 150 K on warming. Hysteretic effects were observed on cooling and warming.

• OSTI ID: 5147606
• Journal Information: Physical Review (Section) B: Condensed Matter; (USA), Vol. 40:16; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
BARIUM OXIDES
PIEZOELECTRICITY
COPPER OXIDES
YTTRIUM OXIDES
ELECTRIC CONDUCTIVITY
HYSTERESIS
LOW TEMPERATURE
MEDIUM TEMPERATURE
SUPERCONDUCTORS
TIME DEPENDENCE
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
CHALCOGENIDES
COPPER COMPOUNDS
ELECTRICAL PROPERTIES
ELECTRICITY
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
360204* - Ceramics
Cermets
& Refractories- Physical Properties
656100 - Condensed Matter Physics- Superconductivity